Greetings! Thank you for your interest in our data.
Below is a brief description of the data included in each file.
Throughout, experimental water columns are labeled Towers 1-8, with Tower 1 being the lowest nutrient concentration input and each progressive number increasing in nutrient concentration input (Tower 8 has the highest nutrient concentration input). Depth can be labeled in meters or ports. Ports are spaced every 2.5 centimeters along the vertical dimension of the tower with port 1 being located at the water's surface and port 60 being located 2.5 centimeters above the bottom of the tower.
Experiments were conducted in late 2006 into early 2007.
light.csv - Light measured at the bottom of the water column (I_out) measured in micro mol photons m^-2 s^-1.
nutrients.csv - phosphorus concentration in water column ( R) measured in micro g dissolved phosphorus L^-1.
tower1.csv- biomass concentration in the water column (B) measured in
cells mL^-1. (tower2-8.csv are the other towers)
phys_and_stoich.csv- physiological and stoichiometric data measured in the water column. In the column headings, anything separated by a '.' should be read as the division sign (e.g. cells.ml is cells per mL). treatment is nutrient input micro g dissolved phosphorus L^-1 corresponding to tower number. depth is in meters. Chl is in micro g L^-1, as is P for phosphorus, N for nitrogen and C for carbon. If the column heading has 'moles' in it, it is the molar ratio.
Data was collected by Jarad Mellard, Kohei Yoshiyama, Christopher Klausmeier, and Elena Litchman. Any questions should be directed to the author, Jarad Mellard (mellard@msu.edu or mellard@ku.edu).